Please use this identifier to cite or link to this item: https://doi.org/10.1007/s00421-021-04681-w
Title: Cerebral autoregulation assessed by near-infrared spectroscopy: validation using transcranial Doppler in patients with controlled hypertension, cognitive impairment and controls
Authors: Mol, Arjen
Meskers, Carel GM
Sanders, Marit L
Mueller, Martin
Maier, Andrea B 
van Wezel, Richard JA
Claassen, Jurgen AHR
Elting, Jan Willem J
Keywords: Science & Technology
Life Sciences & Biomedicine
Physiology
Sport Sciences
Cerebral autoregulation
Near-infrared spectroscopy
Transcranial Doppler
Cognitive dysfunction
Hypertension
Issue Date: 16-Apr-2021
Publisher: SPRINGER
Citation: Mol, Arjen, Meskers, Carel GM, Sanders, Marit L, Mueller, Martin, Maier, Andrea B, van Wezel, Richard JA, Claassen, Jurgen AHR, Elting, Jan Willem J (2021-04-16). Cerebral autoregulation assessed by near-infrared spectroscopy: validation using transcranial Doppler in patients with controlled hypertension, cognitive impairment and controls. EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY 121 (8) : 2165-2176. ScholarBank@NUS Repository. https://doi.org/10.1007/s00421-021-04681-w
Abstract: Purpose: Cerebral autoregulation (CA) aims to attenuate the effects of blood pressure variation on cerebral blood flow. This study assessed the criterion validity of CA derived from near-infrared spectroscopy (NIRS) as an alternative for Transcranial Doppler (TCD). Methods: Measurements of continuous blood pressure (BP), oxygenated hemoglobin (O2Hb) using NIRS and cerebral blood flow velocity (CBFV) using TCD (gold standard) were performed in 82 controls, 27 patients with hypertension and 94 cognitively impaired patients during supine rest (all individuals) and repeated sit to stand transitions (cognitively impaired patients). The BP-CBFV and BP-O2Hb transfer function phase shifts (TFφ) were computed as CA measures. Spearman correlations (ρ) and Bland Altman limits of agreement (BAloa) between NIRS- and TCD-derived CA measures were computed. BAloa separation < 50° was considered a high absolute agreement. Results: NIRS- and TCD-derived CA estimates were significantly correlated during supine rest (ρ = 0.22–0.30, N = 111–120) and repeated sit-to-stand transitions (ρ = 0.46–0.61, N = 19–32). BAloa separation ranged between 87° and 112° (supine rest) and 65°–77° (repeated sit to stand transitions). Conclusion: Criterion validity of NIRS-derived CA measures allows for comparison between groups but was insufficient for clinical application in individuals.
Source Title: EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
URI: https://scholarbank.nus.edu.sg/handle/10635/234880
ISSN: 1439-6319
1439-6327
DOI: 10.1007/s00421-021-04681-w
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